The Optimization And Experimental Researches On Diffusion Absorption Refrigeration System

The experiment will study on unity machine，the cold is generated by thediffusion absorption refrigeration system which is powered superheated steamgenerated by solar energy. As the solar energy is influenced by weather seriously, theexperiment will take the method of using the ice storage to supply the cold energy tothe freezer and air conditioner when the solar energy is not enough or at night.Based on the background above，This paper mainly does the following work：Based on the whole character of the diffusion absorption refrigeration system，firstlythis paper will do the optimization of parts of the system，which will improve theefficiency of the system. Then the thermal design and calculation will be done and theexperiment platform will be set up. Finally，the system performance will be tested inthe ice storage conditions，release ice-releasing conditions and the general conditions.The variations of the amount and the rate of ice storage with time will be obtained，and their curves will be drawn，which will provide a guiding significance for thestudy，design of unity machine and ice storage later.The experimental results show that the heat source import temperaturemaintained at120℃，ice storage time lasts about5hours and system COP finallymaintained at about0.52in ice-making mode，the coldness storing capacity is about9.5kWh. The ice-melting mode lasts about3.5hours. Air supply temperature canmaintains at7℃after a period of time，which is in the range of cold air distributionand meet the application of air conditioning and refrigerating cabinet requirements inice-melting mode. In general mode, as the system needs lower evaporationtemperature, the system COP is higher than it in ice-making mode, The generatortemperature of around100℃can satisfy the cooling requirement. Air supplytemperature can maintains at7℃after a period of time. Experimental results showthat the scheme that the diffusion absorption refrigeration system driven bysuperheated steam generated by solar heating can supply cooling capacity for the airconditioning and freezer is feasible.